package com.winhands.base.util;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFCellUtil;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;



public  class ExcelExport<T> {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		 System.out.println("初始化excel生成器!");
	}
	
	public void excelExport(Collection<T> dataset, OutputStream out) {
		exportExcel("sheet1", null, dataset, out, "yyyy-MM-dd");
	}

	public void excelExport(String[] headers, Collection<T> dataset, OutputStream out) {
		exportExcel("sheet1", headers, dataset, out, "yyyy-MM-dd");
	}
	
	public void excelExport(String[] headers, Collection<T> dataset, OutputStream out, String pattern) {
		exportExcel("sheet1", headers, dataset, out, pattern);
	}

	/**
	 * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
	 * 
	 * @param title
	 *            表格标题名
	 * @param headers
	 *            表格属性列名数组
	 * @param dataset
	 *            需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的<br>
	 *            javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
	 * @param out
	 *            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
	 * @param pattern
	 *            如果有时间数据，设定输出格式。默认为"yyyy-MM-dd"
	 */
	public void exportExcel(String title, String[] headers,
			Collection<T> dataset, OutputStream out, String pattern) {
		// 声明一个工作薄
		HSSFWorkbook workbook = new HSSFWorkbook();
		// 生成一个表格
		HSSFSheet sheet = workbook.createSheet(title);
		// 生成一个样式
		HSSFCellStyle style = workbook.createCellStyle();
		// 设置这些样式
		style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
		style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		// 生成一个字体
		HSSFFont font = workbook.createFont();
		font.setColor(HSSFColor.VIOLET.index);
		font.setFontHeightInPoints((short) 8);
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		// 把字体应用到当前的样式
		style.setFont(font);
		// 生成并设置另一个样式
		HSSFCellStyle style2 = workbook.createCellStyle();
		style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
		style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
		style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
		style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
		style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
		style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
		style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
		// 生成另一个字体
		HSSFFont font2 = workbook.createFont();
		font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		// 把字体应用到当前的样式
		style2.setFont(font2);
		// 声明一个画图的顶级管理器
		HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
		// 定义注释的大小和位置,详见文档
		HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
				0, 0, 0, (short) 4, 2, (short) 6, 5));
		// 设置注释内容
		comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
		// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
		comment.setAuthor("leno");
		// 产生表格标题行
		HSSFRow row = sheet.createRow(0);
		for (int i = 0; i < headers.length; i++) {
			HSSFCell cell = row.createCell(i);
			cell.setCellStyle(style);
			HSSFRichTextString text = new HSSFRichTextString(headers[i]);
			cell.setCellValue(text);
		}
		// 遍历集合数据，产生数据行
		Iterator<T> it = dataset.iterator();
		int index = 0;
		while (it.hasNext()) {
			index++;
			row = sheet.createRow(index);
			T t = (T) it.next();
			// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
			Field[] fields = t.getClass().getDeclaredFields();
			for (int i = 0; i < fields.length; i++) {
				sheet.setColumnWidth(i, 3766);
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style2);
				Field field = fields[i];
				String fieldName = field.getName();
				String getMethodName = "get"
						+ fieldName.substring(0, 1).toUpperCase()
						+ fieldName.substring(1);
				try {
					Class tCls = t.getClass();
					Method getMethod = tCls.getMethod(getMethodName, new Class[] {});
					Object value = getMethod.invoke(t, new Object[] {});
					// 判断值的类型后进行强制类型转换
					String textValue = null;
					if (value instanceof Date) {
						Date date = (Date) value;
						SimpleDateFormat sdf = new SimpleDateFormat(pattern);
						try {
							textValue = sdf.format(date);
						} catch (Exception e) {
						    System.out.println("类型转换错误!sdf.format(date).."+date);
						}
						
					} else if (value instanceof byte[]) {
						// 有图片时，设置行高为60px;
						row.setHeightInPoints(60);
						// 设置图片所在列宽度为80px,注意这里单位的一个换算
						sheet.setColumnWidth(i, (short) (35.7 * 80));
						// sheet.autoSizeColumn(i);
						byte[] bsValue = (byte[]) value;
						HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
								1023, 255, (short) 6, index, (short) 6, index);
						anchor.setAnchorType(2);
						patriarch.createPicture(anchor, workbook.addPicture(
								bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
					} else {
						// 其它数据类型都当作字符串简单处理
						try {
							textValue = value.toString();
						} catch (Exception e) {
							System.out.println("类型转换错误!value.toString().."+value);
						}
						
					}
					// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
					if (textValue != null) {
						Pattern p = Pattern.compile("^//d+(//.//d+)?$");
						Matcher matcher = p.matcher(textValue);
						if (matcher.matches()) {
							// 是数字当作double处理
							cell.setCellValue(Double.parseDouble(textValue));
						} else {
							HSSFRichTextString richString = new HSSFRichTextString(
									textValue);
							HSSFFont font3 = workbook.createFont();
							font3.setColor(HSSFColor.BLUE.index);
							richString.applyFont(font3);
							cell.setCellValue(richString);
						}
					}
				} catch (Exception e) {
					e.printStackTrace();
				} finally {
					// 清理资源
				}
			}
		}
		try {
			workbook.write(out);
			out.flush();
			out.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	
	/**
	  * 设置合并单元格格式
	  * @param sheet
	  * @param region
	  * @param cs
	  */
	 @SuppressWarnings("deprecation")
	 public static void setRegionStyle(HSSFSheet sheet, CellRangeAddress region, HSSFCellStyle cs) {
	  for (int i = region.getFirstRow(); i <= region.getLastRow(); i++) {
	   HSSFRow row = HSSFCellUtil.getRow(i, sheet);
	   for (int j = region.getFirstColumn(); j <= region.getLastColumn(); j++) {
		    HSSFCell cell = HSSFCellUtil.getCell(row, (short) j);
		    cell.setCellStyle(cs);
	   }
	  }
	 }
	 /**
	  * 
	  * <b>Summary: </b>
	  *    exportExcel  定制化标头
	  * void
	  * @param title
	  * @param headers
	  * @param dataset
	  * @param out
	  * @param pattern 
	  * exportExcel
	  * Dec 27, 2013
	  */
	 public void exportExcel(Collection<T> dataset, OutputStream out,HSSFWorkbook workbook,int index,String pattern) {
		    //获得sheet
		    HSSFSheet sheet = workbook.getSheetAt(0);
		    // 生成并设置另一个样式
			HSSFCellStyle style2 = workbook.createCellStyle();
			style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
			style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			// 生成另一个字体
			HSSFFont font2 = workbook.createFont();
			font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
			// 把字体应用到当前的样式
			style2.setFont(font2);
			// 声明一个画图的顶级管理器
			HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
			// 定义注释的大小和位置,详见文档
			HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
					0, 0, 0, (short) 4, 2, (short) 6, 5));
			// 设置注释内容
			comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
			// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
			comment.setAuthor("leno");
			// 产生表格标题行
			
			HSSFRow row;
			
			// 遍历集合数据，产生数据行
			Iterator<T> it = dataset.iterator();
			while (it.hasNext()) {
				index++;
				row = sheet.createRow(index);
				T t = (T) it.next();
				// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
				Field[] fields = t.getClass().getDeclaredFields();
				for (int i = 0; i < fields.length; i++) {
					sheet.setColumnWidth(i, 3766);
					HSSFCell cell = row.createCell(i);
					cell.setCellStyle(style2);
					Field field = fields[i];
					String fieldName = field.getName();
					String getMethodName = "get"
							+ fieldName.substring(0, 1).toUpperCase()
							+ fieldName.substring(1);
					try {
						Class tCls = t.getClass();
						Method getMethod = tCls.getMethod(getMethodName, new Class[] {});
						Object value = getMethod.invoke(t, new Object[] {});
						// 判断值的类型后进行强制类型转换
						String textValue = null;
						if (value instanceof Date) {
							Date date = (Date) value;
							SimpleDateFormat sdf = new SimpleDateFormat(pattern);
							try {
								textValue = sdf.format(date);
							} catch (Exception e) {
							    System.out.println("类型转换错误!sdf.format(date).."+date);
							}
							
						} else if (value instanceof byte[]) {
							// 有图片时，设置行高为60px;
							row.setHeightInPoints(60);
							// 设置图片所在列宽度为80px,注意这里单位的一个换算
							sheet.setColumnWidth(i, (short) (35.7 * 80));
							// sheet.autoSizeColumn(i);
							byte[] bsValue = (byte[]) value;
							HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
									1023, 255, (short) 6, index, (short) 6, index);
							anchor.setAnchorType(2);
							patriarch.createPicture(anchor, workbook.addPicture(
									bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
						} else {
							// 其它数据类型都当作字符串简单处理
							try {
								textValue = value==null?"0":value.toString();
							} catch (Exception e) {
								System.out.println("类型转换错误!value.toString().."+value);
							}
							
						}
						// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
						if (textValue != null) {
							Pattern p = Pattern.compile("^//d+(//.//d+)?$");
							Matcher matcher = p.matcher(textValue);
							if (matcher.matches()) {
								// 是数字当作double处理
								cell.setCellValue(Double.parseDouble(textValue));
							} else {
								HSSFRichTextString richString = new HSSFRichTextString(
										textValue);
								HSSFFont font3 = workbook.createFont();
								font3.setColor(HSSFColor.BLUE.index);
								richString.applyFont(font3);
								cell.setCellValue(richString);
							}
						}
					} catch (Exception e) {
						e.printStackTrace();
					} finally {
						// 清理资源
					}
				}
			}
			try {
				workbook.write(out);
				out.flush();
				out.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
}
